Impacts of exotic plant invasions on terrestrial ecosystem below-ground carboncycling and carbon pool
外来植物入侵对陆地生态系统地下碳循环及碳库的影响

Exotic plant invasions have been identified as one of the most important global problems facing natural ecosystems, where they threaten biodiversity, ecosystem structure and function, and ecosystem stability. In the past little attention has been paid to the potential impacts of exotic species invasion on soil nutrient cycling processes, but recently study in this area have increased and merged as a central issue in invasion ecology. Clearly, below-ground dynamics are a key link in carbon cycling. Invasive species may affect this cycle in a variety of ways: by changing litter inputs (amount, litter chemistry, variation in litter components as a result of changed plant morphology, seasonal timing of entry) and altering the root system (added effects of the roots of the invader). The effects of invasion on soil microbial communities will cause the change of soil respiration. In general, the soil respiration rate of invasive plants is higher than that of indigenous species. Most of the available literature suggests that invasive exotic species can have a potential impact on soil carbon process and the resultant soil carbon pool. However, because of the large the diversity of exotic species and available invasion sites, patterns of difference between invasive and native species are inconsistent trends both soil carbon pools and soil organic carbon mineralization. We conclude that these problems needed further study and present some proposals for further discussion.